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For further information on interval dimensions, refer to the
Repetitive Defect Ruler, Figure 7-19.
Possible Cause Action
Toner Cartridge. The circumference of
the photoconductive drum is 3.75 inches
(94mm). The circumference of the
developer roller is 2 inches (51mm). If a
defect appears in the print image at
these intervals, assume the defect is
associated with the Toner Cartridge.
Replace the Toner Cartridge.
Fuser Assembly. The Fuser Roller’s
circumference is approximately
2.5 inches (63mm) for the LJ4, and 3-1/8
(79mm) for the LJ4+/5. If a defect
appears at this interval, assume the
defect is associated with the Fuser
Assembly.
Clean the Fuser Assembly rollers.
Replace the assembly if necessary.
Dirty Roller. Any dirty roller along the
paper path may result in a pattern of
repetitive print image defects.
Examine and clean rollers along the
paper path.
Table 7-19
Repetitive Defects
Troubleshooting 7-41